Add font commands

src/tokens/constants/font_commands.rs

@@ -0,0 +1,6 @@
+pub const F_BB: &str = "bb";
+pub const F_BBB: &str = "bbb";
+pub const F_CC: &str = "cc";
+pub const F_TT: &str = "tt";
+pub const F_FR: &str = "fr";
+pub const F_SF: &str = "sf";

src/tokens/constants/mod.rs

@@ -5,4 +5,5 @@ pub mod logical;
 pub mod grouping;
 pub mod arrows;
 pub mod accents;
-pub mod greek;
+pub mod greek;
+pub mod font_commands;